docs/develop/cmodules.rst: Add link to source code for user C example.

dpgeorge · dpgeorge · commit dbb13104ca61 · 2020-10-29T23:10:43.000+11:00
Signed-off-by: Damien George &lt;damien@micropython.org&gt;
diff --git a/docs/develop/cmodules.rst b/docs/develop/cmodules.rst
@@ -61,8 +61,9 @@ Basic example
 
 This simple module named ``cexample`` provides a single function
 ``cexample.add_ints(a, b)`` which adds the two integer args together and returns
-the result. It can be found in the MicroPython source tree and has
-a source file and a Makefile fragment with content as descibed above::
+the result. It can be found in the MicroPython source tree
+`in the examples directory <https://github.com/micropython/micropython/tree/master/examples/usercmodule/cexample>`_
+and has a source file and a Makefile fragment with content as descibed above::
 
     micropython/
     └──examples/
